FR 6723 then BA 457 at Madrid
Marrakesh → Madrid → London Heathrow
Timetable, Madrid time
11:20FR 6723 from Marrakesh at the gate
10:30BA 457 to London Heathrow leaves the gate
23 h 10 apart on the timetable, overnight
BA 457 leaves 23 h 10 after FR 6723 arrives on the timetable: more than half a day, so not a connection we count.